YBa2Cu3O7 is a member of the class of superconductors whose critical temperatures (Tc) are above 90 K. Devices using these materials would require minimal refrigeration to operate in space. It is important, therefore, to determine the effect of natural space radiation on these materials. Preliminary experiments have been performed to study displacement damage and ionization effects in 100- mu m-thick films of YBa2Cu3O7. Samples of these films were irradiated at room temperature with (1) 56-MeV electrons up to a total fluence of 1.6*1015 cm-2, (2) 6 MeV protons up to a total fluence of 5.0*1013 cm-2, and (3) 63-MeV protons up to a total fluence of 1.09*1014 cm-2. It is concluded from the electron irradiations that the major effect of ionization is to increase the normal resistivity of the material. Although Tc(onset) was not much affected by either the electron or the proton irradiations, Tc(completion) varied substantially with proton fluence, at the higher fluences there was evidence of a nonsuperconducting region even at 4 K. It appears from the shape of the resistivity-temperature curve that high-energy proton irradiation induces a partially superconducting multiphase mosaic.
Radiation effects in high Tc superconductors for space applications
Supraleiter, Strahlungswirkung, Raumfahrt Strahlungswirkung auf Supraleiterwerkstoffe mit hoher kritischer Temperatur fuer Anwendungen in der Raumfahrt
IEEE Transactions on Nuclear Science ; NS-34 , 6, PT.1 ; 1782-1785
1987
4 Seiten, 19 Quellen
Article (Journal)
English
SUPRALEITENDE DUENNE SCHICHT , SUPRALEITER ZWEITER ART , HIGH TEMPERATURE SUPERCONDUCTORS , KRITISCHE TEMPERATUR , ELEKTRONENBESTRAHLUNG , RAUMFAHRT , KRYOTECHNIK , SUPRALEITERWERKSTOFF , KOSMISCHE STRAHLUNG , DUENNE SCHICHT , IONISIERENDE STRAHLUNG , PROTONENBESCHUSS , BARIUM , STRAHLUNGSWIRKUNG , YTTRIUM , BARIUMVERBINDUNG , YTTRIUMVERBINDUNG , SUPERCONDUCTING TRANSITION TEMPERATURE
Railway Applications for High-Tc Superconductors
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